KG Toán NC THCS và Luyện thi 10 ChuyênAdaptive thu phát không dây P4
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Adaptive thu phát không dây P4
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In this chapter, the conceptof Adaptive Quadrature AmplitudeModulation (AQAM) is introduced, whereby the modulation mode is adapted at the transmitter on a burst by burst basis. This adaptation is implemented based on thereceiver’s perceived channel qualityand its main BER. motivation is to maximise the transmission throughput at a given target In our investigations AQAM is initially applied in a narrow-band environment in conjunction with power control, where the transmitted power is only varied near the modem mode switching thresholds of the AQAM scheme. Subsequently, AQAM is investigated in a wideband channel in conjunction with a DE-assisted receiver....
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